Window lock



- Feb. 8, 1938. w. F. HINDERER ET AL 2,107,479

WINDOW LOCK Filed July 15, 1936v 1 lfiir/jmwa 15 M [Q Inventor W1 8i 2in/defer jazz/2.; lqz'naf er'er Attorneys Patented Feb. 8, 1938 PATENTOFFICE WINDOW LOCK Walter F. Hinderer and Louis C. Hinderer, Kankakee,Ill.

Application July 15,

1 Claim.

Our invention relates generally to means for locking the sashes ofwindows against relative movement, and particularly to a lock to bemounted on one sash and engageable with the other sash, in a manner topermit both sashes to assume partially open positions while preventingthe sashes or either of them from being further opened, and an importantobject of our invention is to provide a simple and efficient arrangementof this character which is inexpensive, and can be easily installed.

Other important objects of our invention will be apparent from a readingof the following description taken in connection with the drawing,wherein for purposes of illustration we have shown a, preferredembodiment of the invention.

In the drawing:

Figure 1 is a general elevational View of the inner side of a windowshowing the device of the invention incorporated in the sash structure.

Figure 2 is an elevational edge view showing the bolt of the deviceextended in looking position.

Figure 3 is a front elevational view of the device.

Figure 4 is a side elevational view of the easing with the bolt removed.

Figure 5 is a longitudinal sectional view taken through Figure 4.

Figure 6 is a longitudinal vertical sectional View taken through Figure3 approximately on the line 6-6.

Figure '7 is an end view of the spring.

Figure 8 is a side elevational view of the belt.

Figure 9 is an end View of the shell.

Referring in detail to the drawing, the numeral 5 generally designates aconventional type of window structure containing the upper sash 6 andthe lower sash I. (In accordance with the present invention theembodiment which is generally designated 8 is installed on the side railof the upper sash 6, and this look comprises the suitably shaped plate 9which has screw or bolt receiving holes l0 and H therein receivingattaching means for attaching the same in place as indicated in Figure1, and suitably mounted on the back of this plate 9 is the tubularcasing !2 which extends in a generally horizontal position.

Inside of the tube 12 and in vertically spaced positions are the housingmembers l3 and I4 which are joined as indicated by the numerals l5 andI6 to a receiving opening in the face plate 9. The tube has a partlyclosed end I! which has punched out portions l8 and I9 which are 1936,Serial No. 90,770 (01. 292-450) bent over as indicated by the numeral 20to form a holder for one end of the expanding helical spring 2|.

Slidable in the housing members !3 and I4 is the rotatable bolt which isgenerally designated 22 and which comprises a tubular portion 23 whichis circumposed on the spring 2| at the head 24 which has a reduced boss25 inserted in the outer end of the tube 23. Fingers 26 on the inner endof the boss 25 provide means for engaging the cross member 21 of thespring 2! in a manner to tension the bolt 22 for rotation in a directionopposite to that in which it may be turned in the operation thereof. Theouter end of the head 24 has a counter-sunk central portion 21 and theannular portion thereabout is provided with notches or knurls 28facilitating manuual turning of the bolt. The bolt has at its inner enda laterally extending pin 29 which slides in the slot 30 in the tube l2,the said slot 30 having at its inner end the lateral bolt lockingportion 3! and at its front end the lateral bolt locking portion 32.

When the bolt is in the locking position illustrated in Figures 6, thesame may be rotated to the left to place the stop pin 29 in the portion32 of the slot, so as to make it impossible to push the bolt inwardlyinto the unlocking position without first turning the bolt to the leftto release the pin from the slot portion 32. The slot portion 3| isprovided so that the locking pin 29 of the bolt will upon rotation ofthe bolt by the torque force of the spring be engaged with the portion3i and thereby lock the bolt in the inward or retracted position. Torelease the bolt from the retracted position the bolt must be rotated byapplication of manual force to the head 24 in a direction to bring thestop pin 29 out of the slot portion 3!, at which time the force of theexpanding spring 2! will project the bolt forwardly into the extended orsash-locking position illustrated in Figures 2 and 6, wherein the bolt22 overlies the upper end of the lower window sash I, so that the lowerwindow sash 1 cannot be moved upwardly relative to the upper sash 6beyond the point of engagement of the upper end of the lower sash withthe bolt 22. Both of the sashes may be moved upwardly until the upperend of the upper sash engages the top of the window frame; and similarlythe sashes may both be moved downwardly until the lower end of the lowersash engages the bottom of the window frame. For the same reasons thelower sash or the upper sash may be fully closed at a time when either ione or the other is in a partially opened position,

limited by the arrangement of the device of the invention and. theprecise positioning thereof.

Although we have shown and described herein a preferred embodiment ofour invention, it is to be definitely understood that we do not'desireto limit the application of the invention thereto, and any change orchanges may be made in the materials, and in the structure andarrangement of the parts, Within the spirit of 'the invention and thescope of the subjoined claim.

{What is claimed is:-

A window lock comprising a cylindrical casing open at one end andsubstantially closed at its other end and having a mounting plate at theopen end, said casing being further provided with an internallongitudinal guide-way having laterally and correspondingly directedlatching tel;- minals, a helical compression spring extendinglongitudinally and centrally of the said casing and secured at its innerextremity to the said substantially closed end of the casing, a tubularplunger slidable and rotatable in said casing and circumposed. on thesaid spring, a pin on said plunger engaging in the guide-Way of thecasing, a separately formed plunger head provided with a reduced bosshaving a forced fit in and closing the outer end of the plunger, saidboss providing a bearing surface against which the outer end of thespring is pressed to normally urge the plunger outwardly of the casing,andfingers on the inner end of the boss in engagement with the springand holding the latter in a state of torsion effective to rotate theplunger at the end of its inward and outward travel for automaticallyseating'the pin of the plunger in a latching terminal of the saidguideway.

WALTER F. HINDERER.

LOUIS C. HINDERERI'

